During this phase, ANGSLP established foundational school-based advocacy networks including the Freetown Secondary School for Girls, Grace School of Science, St Joseph's Convent, Methodist Girls High School, and Annie Walsh Memorial. 

These schools hosted pilot projects such as campus girl parliaments, rights awareness sessions, and interschool advocacy boot camps. 

Over 8,000 girls received direct leadership training and gender education.

In response to the COVID-19 pandemic, ANGSLP launched a national sensitization campaign themed “Say No to Sexual Offences and Yes to Education – Paopa.” 

This campaign reached over 12,000 people across Western Area Urban and Rural, Bo, Kenema, and Port Loko. 

It provided COVID-19 prevention education while integrating gender-based violence messaging and educational retention initiatives, particularly targeting vulnerable girls.

From 2021 to 2023, ANGSLP intensified its advocacy through debate competitions, awards nights, public speaking contests, and stakeholder dialogues. 

The campaigns prioritized implementation of the 2019 Sexual Offences Act, judicial responsiveness, and reproductive rights awareness. 

A nationwide campaign against Female Genital Mutilation (FGM) was launched, engaging over 1,500 traditional leaders, culminating in 27 villages pledging to abandon the practice.

In 2023, ANGSLP made history by organizing the first-ever National Mock Parliament in the Well of Parliament, uniting girls from all sixteen districts. 

The event empowered girls to simulate legislative processes, debate national issues, and submit gender-focused recommendations. 

This landmark assembly elevated the conversation on political representation, triggering national discourse on the visibility of girls in political processes.

The organization spearheaded high-level advocacy campaigns calling for increased space for girls in State House and Parliament. 

It lobbied government ministries and political actors to operationalize the 30% quota, while simultaneously summoning the Sierra Leone Bar Association to uphold justice for rape survivors. 

ANGSLP’s juvenile court monitoring exposed delays in prosecutions and informed a national position paper urging judicial accountability.

In 2025, ANGSLP became the first girl-led organization in Africa to hold a symbolic State Opening Ceremony. 

The elected President addressed the nation, articulating issues affecting girls in areas of sexual violence, economic exclusion, and access to justice. 

A comprehensive Action Plan Paper was presented to the Government of Sierra Leone, advocating for policy shifts, budget allocation for girl empowerment, and implementation of the GEWE Act.