Featuring the Petaluma School of Ballet & North Coast Ballet. $28.30–$38.80. Dec. 13: 7:30 p.m. Dec. 14: 1:30 & 6:30 p.m. Dec. 15: 1:30 p.m. Evert B Person Theatre. Sonoma State University. 1801 E. Cotati Ave., Rohnert Park. Tickets: petalumaschoolofballet.com.