Education Section of Express Entry Profile

[sandy007]

This is first line when we started Express Entry education section

We will assess xyz’s secondary and post-secondary periods of study for eligibility for Express Entry so on .......

So my questions are

1. Is grade 10 is considered secondary education or grade 12 ?( sorry if it's look silly question)
2. What should be complete/full academic years for secondary education?

Or we don't need to include secondary education because we only evaluated post secondary educations by WES or other organizations.( and we don't have Evaluated secondary education)

Thanks in advance