Here are five stocks added to the Zacks Rank #1 (Strong Buy) List today:Donegal Group Inc. (DGICA) : This insurance holding company has seen the Zacks Consensus Estimate for its current year earnings increasing 100% over the last 60 days.Scholastic Corporation (SCHL) : This children's publishing company has seen the Zacks Consensus Estimate for its current year earnings increasing 14.6% over the last 60 days.Powell Industries, Inc. (POWL) : This custom-engineered solutions provider has seen the Zacks Consen ...