Here are images taken from the mock election in New Era Elementary School where there are fifty voters participants.
From fifty only five ballots were rejected because of two reasons; ovals are not fully shaded and there are ambiguous markings on the paper that the PCOS machine cannot recognize. The mock poll started at 8AM and ended before 10 am.
The mock poll winners in New Era were Jose Rizal as President, and Marcelo H. del Pilar as Vice President.

Voters who are selected by the Commission on Election where there two rooms assigned to them, the voting area and the holding area where voters were informed and educated on the poll automation.

Voter putting her ballot on the PCOS machine, only one ballot will be alloted on each voters, it takes a voter from 5 to 10 minutes to choose his/her candidate.

Ambassador Henrietta de Villa, chairman of the Parish Pastoral Council on Responsible Voting (PPCRV) observes the mock election at the New Era Elementary School. She recommends that the voters should double check their ballots first before putting it in the PCOS machine to avoid possible ambiguous marks and partial shading.

Automated Election System Watch (AES Watch) convenor Alfredo Pascual visits the mock election in New Era Elementary School and talks to the voters on their experience with the new system that will be implemented on May 10.

Teachers collated the Election Receipts and let the election officers signed along with sectors and poll watchers accredited by the Comelec.
Click here to watch the video of a Smartmatic representative explaining the cause of ballot rejection on the PCOS machine.