Introduction to Educational Research by Suter

HyperStat Online

Rice Virtual Lab

Places to get data: DASL (the Data and Story Library) , National Center for Education Statistics (NCES), The Interuniversity Consortium for Political and Social Research (ICPSR) ICPSR

Here is the link to PIAAC project
For log-file data, you can find in

Reporting Statistics in Psychology

Reporting Statistics in APA Style

Vassar Stats (Free Online Statistical Applets)

BrightStat (Free Online Statistical Software)

PSPP (a Free replacement for the proprietary program SPSS)

StatPlus:Mac LE (This handy add-on replaces Microsoft Analysis Toolpak in Excel 2011 for Mac.)

R (Free and powerful statistics software)

How to calcluate Effect Size (Cohen's d and Partial eta squared)