user: Question: What is the mean Evaluation number (before April 2009) when the Peak lessons taught was less than 80 and the negative percentage of evaluations was 0.8%?
Columns: ['Evaluation average (From February 2011)', 'Evaluation average (From April 2009)', 'Evaluation average (Before April 2009)', '% of negative evaluations', 'Submitting schedule on time', 'Punctuality/Attendance issues', 'Peak lessons taught']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [4.7, '4.6', '4.6', '0.3%', 'Always', 'None', 80.0]
SQL:

assistant: SELECT AVG("Evaluation average (Before April 2009)") FROM "Table" WHERE "Peak lessons taught" < 80.0 AND "% of negative evaluations" = '0.8%';