School's back in session! Queen Letizia of Spain sits in a tiny desk and chats with young pupils during school visit on day two of her trip to Guatemala

Queen Letizia of Spain beamed as she joined young pupils - and sat on a tiny desk - on day two of her Guatemala trip.

The mother-of-two, 51, was all smiles as she spent the second day of her trip to the Central American country at the San Jose de Chacaya school.

The royal was unafraid to get stuck in with students and chatted with young children in the classroom while they wrote on white boards.

Snaps also showed her laughing with the kids, and attentively taking part in the lesson.

She looked smart in a red Spanish Agency for International Development Cooperation vest over a white shirt and brown trousers.

Queen Letizia of Spain, 51, appeared in high spirits as she San Jose de Chacaya in Guatemala today

Queen Letizia of Spain, 51, appeared in high spirits as she San Jose de Chacaya in Guatemala today

Letizia styled her silver tresses in a practical yet sleek ponytail for the occasion. She opted for a casual makeup look with a touch of crimson lipstick, which accentuated her natural beauty.

After visiting the school, the royal took to a water, sanitation, child malnutrition and women empowerment project in the same area.

Letizia has travelled to Guatemala to learn about various projects where Spanish cooperation works.

It is her ninth trip made to give visibility to the programs that Spanish cooperation develops in areas considered a priority.

Her royal trip comes after journalist Jaime Peñafiel, 91, launched a fresh attack on the European Queen with his new book 'Letizia's Silences', which was was published in Spain last week.

Following his first best-selling book 'Letizia & I' (which alleged that Letizia had an affair with her ex brother-in-law Jamie del Burgo), the veteran royal reporter claims in his latest work that Felipe was 'aware' of his wife's alleged infidelity 'in real time'.

In January, Jaime Peñafiel was sacked by the Spanish newspaper El Mundo after 20 years following a series of damaging allegations made in his first book 'Letizia & I'.

His best-selling book alleged that Queen Letizia had an affair with her ex-brother-in-law Jamie del Burgo. The Spanish Royal Household refused to comment on the claims at the time. 

The Spanish Queen got stuck in with student culture during the visit and sat at a wooden desk with other pupils

The Spanish Queen got stuck in with student culture during the visit and sat at a wooden desk with other pupils 

Later in the day, the 51-year-old mother-of-two visited a women's group and looked at their market stalls

Later in the day, the 51-year-old mother-of-two visited a women's group and looked at their market stalls 

The 51-year-old appeared animated as she observed children's clothing at the market stalls in San Jose de Chacaya

The 51-year-old appeared animated as she observed children's clothing at the market stalls in San Jose de Chacaya

Letizia chatted with San Jose de Chacaya locals while walking through the streets on the second day of her visit to Guatemala

Letizia chatted with San Jose de Chacaya locals while walking through the streets on the second day of her visit to Guatemala 

In his latest work, Jamie claims that Felipe was 'aware that Letizia was cheating on him in real time' as her bodyguards have an obligation to report on her whereabouts.

The author alleges that bodyguards joined Queen Letizia on a trip she took to New York in 2011 with her 'lover' Jaime del Burgo, whom she had dated before meeting Felipe.

The author wrote: 'That day [in New York], she was accompanied by her faithful escorts, who, without a doubt, any, they would pass a report to the Ministry of the Interior or [the Palace of] Zarzuela.'

Following this, Jaime claims that Felipe has been left 'crushed and destroyed' by his wife's alleged cheating.

The mother-of-two appeared cheerful as she smiled for a photograph with local school children

The mother-of-two appeared cheerful as she smiled for a photograph with local school children 

The wife of King Felipe of Spain opted for a casual makeup look for the occasion, complete with red eyeshadow

The wife of King Felipe of Spain opted for a casual makeup look for the occasion, complete with red eyeshadow

Letizia is visiting Guatemala to learn about various projects in the country where the  Spanish cooperation works

Letizia is visiting Guatemala to learn about various projects in the country where the  Spanish cooperation works

The royal styled her hair in a practical yet classy ponytail as she smiled with school children for a photograph

The royal styled her hair in a practical yet classy ponytail as she smiled with school children for a photograph

Letizia visited different water, sanitation, child malnutrition and women empowerment projects during the second day of her trip to Guatemala

Letizia visited different water, sanitation, child malnutrition and women empowerment projects during the second day of her trip to Guatemala

The royal reporter - who worked for Hola! magazine for 20 years - claims that Felipe has been 'plunged into hell' by his wife's supposed 'betrayal' and 'wants to get out'.

Elsewhere in the book, Jamie labels Queen Letizia 'cold, emotionally immature and passive aggressive' and makes unsubstantiated claims she is 'hated' by King Felipe's family.

Jaime Peñafiel, 91, was sacked by the Spanish newspaper El Mundo after 20 years earlier this year following the publication of first book on the Queen called 'Letizia & I'.

The book sent shockwaves through the Spanish Royal Family after the author alleged that the Queen had a romantic relationship with her ex-brother-in-law Jaime del Burgo. The Spanish Royal Household refused to comment on the claims at the time.

Following his dismissal, the veteran journalist has now written another book - called 'Letizia's Silences' - which begins by delving into her early romance with King Felipe.

In the opening chapter, the author sensationally claims that 'everything in Letizia's world has been broken' as a result of alleged 'deceit, adultery and betrayals'.

The author goes on to say Queen Letizia has a 'cold, indestructible and determined' aura about her and that the royal's silence on the recent allegations signify her 'emotional immaturity'.

Jaime claims the royal 'resorts to silence as a way of controlling and punishing other people'.

He then goes on to claim that Letizia's 'passive aggressive' behaviour towards King Felipe is the reason her 'mother-in-law [Queen Sofia] and sisters-in-laws [Infanta Cristina and the Duchess of Lugo] hate her so much'.

In the following chapter, Jaime alleges that King Felipe fell in love with his future wife while watching her present the news.